Different. Business cards that marry Digital to Analog. Something personally created that is different every time. A unique product that raises peoples interest in it, and the process that creates it.

Necessary materials:
An instant camera (a Fuji mini 50s)
Film for the instant camera (Instax)
Transparencies (overhead projector type)
Possibly a computer and printer, or some artistic skill to draw/write on the transparency
Super glue
Creativity

Although this process can create business cards, what you do with it, is limited by your imagination.